Process of treating ores, &amp;c.



A. GUNZEL.

PROCESS OF TREATING ORES, 6w.

APPLICATION FILED APR. 8, 1910.

Patented Feb. 18, 1913.

ARNO GU'NZEL, OF ZIEBIGK, NEAR DESSAU, GERMANY IPROCESS or TREATING ORES, &o.

Specification of Letters Patent.

Application filed April 8, 1910. Serial No. 554,150.

To all whom it may concern: Be it known that I, ARNO Gt'mznn, a subect of the German Em eror, residing at Am Georgengarten, Ziebig near Dessau, Germany, have invented certain new and useful Improvements in Processes of Treating Ores, &c., of which the following is a specification.

This invention relates to the treatment of cement, ores and the like materials, in that 'type of rotary furnace in which the burning zone, the partial cooling zone and the final cooling zone are all located in a single revolving furnace tube.

The essential feature of the invention is the employment of increased vpressure for feeding the fuel into the furnace, whereby the fuel-feed nozzle may be made shorter. By thus increasing the pressure with which the fuel is fed into the furnace, it is possible, even with the use of a short nozzle, to locate the smelting of reducing zone sufficiently far back in the interior of the furnace to allow adequate cooling of the material under treatment as it travels from this zone toward'the outlet of the furnace, so that separate cooling drum can be dispensed with. When very high pressure isused, the nozzle may even be arranged close to the outlet of the furnace. This arrangement enables ore favorable utilization of the chamber of e drum. f

The accompanying drawing illustrates by way of example, one form of rotary furnace. embodying my improvements.

Patented Feb. 18, 1913.

The figure is a vertical longitudinal section.

a is a rotary furnace tube, which is fed more or less continuously with the material to be treated by means of a chute or pipe 6. A nozzle 0 extends into the other end of the furnace tube and the fuel is blown through this nozzle under increased pressure 7 into the furnace tube. The material fed from the pipe 6 is caused by the slope and rotary motion of the furnace tube to travel through the burning, partial cooling and final cooling zones, and leaves the lower end of the tube in a sufliciently cooled condition.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

The process of treating ores and thelike in a rotary furnace, consisting in feedin the material under a slope from one end 0 the furnace and the fuel under such hi h pressure from the other end thereof that e inlet velocity of the fuel exceeds the propagation velocity of the flame to such ,an extent that the reducing zone is transferred toward the back part of the furnace, whereby the burning, partial and final cooling zones will all be formed in the same furnace. In testimony whereof I have aflixed my signature in presence of two witnesses.

ARNO GUNZEL.

Witnesses HENRY HARPER, Hans HEI'MANN. 

